"Alien Contact," for example, is an exercise developed for middle-school students who use hand-held devices that can determine their location.

例如，“Alien Contact”是为中学生开发的一种练习，他们可以使用手持设备来确定自己的位置。

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"The fact is that even children now are on computer terminals for long periods of time, and many are playing games using hand held devices that put strain on their vision system," Dr. Duenas said.

他说：“现在的情况是，连孩子都在电脑上呆很长时间，很多孩子还玩掌上电子游戏机，这就对他们的视觉系统造成了压力。”

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I'm betting that 2011 is the year we say goodbye to guidebooks in their old familiar form and start using travel applications on hand-held mobile devices.

我敢说2011是我们向那些老套的旅游指南告别，开始用手机里的旅游应用程序的一年。

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On the local news stations, anchors literally held their phones in their hand, scrolling through tweets as they ad-libbed their way through their newscasts.

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Out to the movies, at Grandma's for Thanksgiving, they're tapping away at their little hand-held currency reader gadget just checking the situation for the Japanese yen or Zimbabwean dollar.

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They listen, and do not bury their heads in hand-held devices.

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